select vault in menu

src/main/java/PasswordManager.java

@@ -1,7 +1,10 @@
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.Scanner;
 
 public class PasswordManager implements PasswordManagerInterface {
@@ -20,17 +23,17 @@ public class PasswordManager implements PasswordManagerInterface {
     }
 
     public PasswordManager() {
-        try {
-            outputStream.write("Hello World\n".getBytes(StandardCharsets.UTF_8));
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        println("Hello World");
     }
 
     @Override
     public void listVaults() {
+        println("Vaults:");
+    }
+
+    private void println(String output) {
         try {
-            outputStream.write("Vaults:\n".getBytes(StandardCharsets.UTF_8));
+            outputStream.write((output + "\n").getBytes(StandardCharsets.UTF_8));
         } catch (IOException e) {
             e.printStackTrace();
         }
@@ -47,17 +50,14 @@ public class PasswordManager implements PasswordManagerInterface {
         Scanner scan = new Scanner(inputStream);
         running = true;
 
-        sb.append("ciip Gruppe 8 - Password Manager\n\n");
+        sb.append("\nciip Gruppe 8 - Password Manager\n\n");
 
         sb.append("Menu:\n");
         sb.append("- list vaults: l:\n");
+        sb.append("- select vault: v x (replace x with vault id)\n");
         sb.append("- exit: e\n");
 
-        try {
-            outputStream.write((sb + "\n").getBytes(StandardCharsets.UTF_8));
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+        println(sb.toString());
 
         String input = scan.nextLine();
 
@@ -65,6 +65,36 @@ public class PasswordManager implements PasswordManagerInterface {
             running = false;
         } else if (input.equals("l")) {
             listVaults();
+        }  else if (input.startsWith("v")) {
+            String vaultAction = (input.replace('v', ' ')).trim();
+            int vaultId = -1;
+
+            try {
+                vaultId = Integer.parseInt(vaultAction);
+            } catch (NumberFormatException e) {
+                println("-- please enter a correct vault id");
+            }
+
+            if (vaultId >= 0) {
+                try {
+                    int internalOptionCounter = 0;
+                    ArrayList<String> options = new ArrayList<>();
+
+                    for (Method m : Class.forName("Vault").getDeclaredMethods()) {  // returns all declared methods including private or protected
+                        try {
+                            if (Modifier.isPublic(this.getClass().getDeclaredMethod(m.getName()).getModifiers())) {  // filter out methods that are not public (using Modifier) or have arguments (using getDeclaredMethod)
+                                options.add(m.getName());
+                                println(internalOptionCounter + " - " + m.getName());
+                                internalOptionCounter++;
+                            }
+                        } catch (NoSuchMethodException ignore) {
+                            // println("No method with name " + m.getName() + " found");
+                        }
+                    }
+                } catch (ClassNotFoundException e) {
+                    println("-- vaults not implemented yet");
+                }
+            }
         }
     }
 }

src/test/java/PasswordManagerTest.java

@@ -49,13 +49,22 @@ class PasswordManagerTest {
         assertTrue(outputStream.toString().endsWith("Vaults:\n"));
     }
 
+    @Test
+    void menuNavigationOpenVault() {
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        pm.inputStream = new ByteArrayInputStream("v 0\n".getBytes(StandardCharsets.UTF_8));
+        pm.outputStream = outputStream;
+        pm.showMenu();
+        assertTrue(outputStream.toString().endsWith("-- vaults not implemented yet\n"));
+    }
+
     @Test
     void showMenu() {
         ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
         pm.inputStream = getEmptyStringInputStream();
         pm.outputStream = outputStream;
         assertThrowsExactly(NoSuchElementException.class, () -> pm.showMenu());
-        assertTrue(outputStream.toString().startsWith("ciip Gruppe 8"));
+        assertTrue(outputStream.toString().startsWith("\nciip Gruppe 8"));
     }
 
     @Test
@@ -76,7 +85,7 @@ class PasswordManagerTest {
         pm.outputStream = outputStream;
 
         assertThrowsExactly(NoSuchElementException.class, () -> pm.showMenu());
-        assertTrue(outputStream.toString().startsWith("ciip Gruppe 8"));
+        assertTrue(outputStream.toString().startsWith("\nciip Gruppe 8"));
     }
 
     private ByteArrayInputStream getEmptyStringInputStream() {